junction diode is forward biased, then, [AIEEE 2004]
A) the depletion region is reduced and barrier height is increase
B) the depletion region is widened and barrier height is reduced
C) both the depiction region and barrier height are reduced
D) both the depletion region and barrier height are increased
Correct Answer: C
Solution :
[c] When p-end of p-n junction is connected to positive terminal of battery and n-end to negative terminal of battery, then p-n junction is said to be in forward bias. In forward bias, the more numbers of electrons go from p-region to p-region and more numbers of holes go from p-region to n-region. Therefore, major current due to both types of carriers takes place through the junction causing, more recombination of electron hole pairs. Thus causing reduction in height of depletion region and barrier potential.
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